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Reload Thread: 2 dd 1508's bottom out to easy?

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    memphis_vette's Avatar
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    2 dd 1508's bottom out to easy?

    hey guys i got my 2 dd 1508's installed. they are dual 4 ohm with carbon fiber caps. i have them hooked yp to a DD m3. i have some decent power going until they are fully broken in i will put 1k to each ive turned it up a few timd and they bottom out easy. is it just cause they have too much power or box? the box is 1.75 tuned between 35-40 hz. could it be because of the amp tuning? what could help.



    System
    2008 Silverado LTZ
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    Subs- 2x10" FI SSD's fully loaded and high QTS option
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    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991




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    Re: 2 dd 1508's bottom out to easy?

    wait till they break in yo



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    Re: 2 dd 1508's bottom out to easy?

    that





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    Re: 2 dd 1508's bottom out to easy?

    Is that 1.75 ea or for both?



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    Re: 2 dd 1508's bottom out to easy?

    ok well they have about 5 hours of playtime so far. it is 1.75 for both double baflle and counter sunk. with 45's in port



    System
    2008 Silverado LTZ
    H/U- Stock
    Speakers- Stock
    Amp- DD M2b
    Subs- 2x10" FI SSD's fully loaded and high QTS option
    Box- Sealed 1.2^3 downfire
    Wiring- 4 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

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    Re: 2 dd 1508's bottom out to easy?

    5 hours of playtime and they still bottoming out? Hmm try setting your subsonic filter a bit higher and how much power are you throwing them? Bc i had an aq sdc10 and it would bottom out ridiculous easy until it was fully broken in then it would play well under tuning with ease.



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    Re: 2 dd 1508's bottom out to easy?

    1k ea is not too much power for a 1508. I didnt it daily for months. I would agree check the sub sonic. The box seams fine.



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    Re: 2 dd 1508's bottom out to easy?

    i think its the amp settings



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    Re: 2 dd 1508's bottom out to easy?

    I ran a pair on 1800ms each and they did fine...they probably need to be broke in and the subsonc filter turned up some...usually around the middle is where I set mine.....I'm getting ready to do 4 on a DD M4 so it should be similar power




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    Re: 2 dd 1508's bottom out to easy?

    hey guys i checked it out and amp was out of tune. forgot to tune it for new setup. these 8's pound! very impressed



    System
    2008 Silverado LTZ
    H/U- Stock
    Speakers- Stock
    Amp- DD M2b
    Subs- 2x10" FI SSD's fully loaded and high QTS option
    Box- Sealed 1.2^3 downfire
    Wiring- 4 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

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    Re: 2 dd 1508's bottom out to easy?

    Quote Originally Posted by michaellane View Post
    i think its the amp settings

    This ^




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    Re: 2 dd 1508's bottom out to easy?

    Mine bottomed out too till I shallow the box




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    Re: 2 dd 1508's bottom out to easy?

    Quote Originally Posted by memphis_vette View Post
    hey guys i checked it out and amp was out of tune. forgot to tune it for new setup. these 8's pound! very impressed
    That's what we like to hear post a video



    My YouTube Chanel: http://www.youtube.com/user/JmasterJr
    Refs: Sold to blkmrideon22s (Memphis 4kw)
    Bought From:
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    Re: 2 dd 1508's bottom out to easy?

    ok will do ill shoot a vid 2mro thx for the help



    System
    2008 Silverado LTZ
    H/U- Stock
    Speakers- Stock
    Amp- DD M2b
    Subs- 2x10" FI SSD's fully loaded and high QTS option
    Box- Sealed 1.2^3 downfire
    Wiring- 4 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

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    Re: 2 dd 1508's bottom out to easy?

    ur not bottoming them out it is spider noise. dd/aq has a crappy design with many paper thin spiders and it will make noise when pushed hard until broke in. i dont believe the coil can touch the bottom plate...




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